Two-port amplifier model practice problems
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Read the Amplifier class notes.

For the amplifier circuit shown, R_S = 18 kΩ, and R_L = 120 Ω.

For amp 1: R_i1 = 15 kΩ, A₁= 25, R_o1 = 8.2 kΩ.

For amp 2: R_i2 = 6.8 kΩ, A₂= 5, R_o2 = 8.2 kΩ.

For amp 3: R_i3 = 1 kΩ, A₃= 10, R_o3 = 1.8 kΩ.

For amp 4: R_i4 = 1.5 kΩ, A₄= 5, R_o4 = 120 Ω.

If the amplitude of the input signal is v_i = 0.24 V, find the amplitude of the amplified output singnal, v_o.

Answer